CVE-2025-21656: hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur
Description
In the Linux kernel, the following vulnerability has been resolved:
hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur
scsi_execute_cmd() function can return both negative (linux codes) and
positive (scsi_cmnd result field) error codes.
Currently the driver just passes error codes of scsi_execute_cmd() to
hwmon core, which is incorrect because hwmon only checks for negative
error codes. This leads to hwmon reporting uninitialized data to
userspace in case of SCSI errors (for example if the disk drive was
disconnected).
This patch checks scsi_execute_cmd() output and returns -EIO if it's
error code is positive.
[groeck: Avoid inline variable declaration for portability]
Classification
CVE ID: CVE-2025-21656
Affected Products
Vendor: Linux
Product: Linux
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.05% (probability of being exploited)
EPSS Percentile: 17.98% (scored less or equal to compared to others)
EPSS Date: 2025-02-19 (when was this score calculated)
References
https://git.kernel.org/stable/c/53e25b10a28edaf8c2a1d3916fd8929501a50dfchttps://git.kernel.org/stable/c/42268d885e44af875a6474f7bba519cc6cea6a9d
https://git.kernel.org/stable/c/82163d63ae7a4c36142cd252388737205bb7e4b9